Evidence for exhaustion in the conductivity of the infinite-dimensional periodic Anderson model

Monte Carlo–maximum entropy calculations of the conductivity of the infinite-dimensional periodic Anderson model are presented. We show that the optical conductivity displays anomalies associated with the exhaustion of conduction-band states near the Fermi energy including a Drude weight, which rises with temperature, with weight transferred from a temperature and doping-dependent mid-infrared ~IR! peak and a lowfrequency incoherent contribution. Both the Drude and mid-IR peaks persist up to very high temperatures. The resistivity displays a nonuniversal peak and two other regions associated with impuritylike physics at high temperatures and Fermi-liquid formation at low T. @S0163-1829~99!04839-0#